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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd436bfe8a9908d4a1ec00281a5f030982d9b30f200dc0486f688134238f9bd84' 
  AND token = 'L8iA72nzUi2yEwQYSQ4pVK6LgOat9uSwzGE3o/WdCTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}