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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd3619aeb3df405f12df6c5670af69750c4fd15c6b0a60447e215c58b1688f8c' 
  AND token = '72MyATJE/88/ticXLtUR3F2JO7d/a0f6+9MlOZunp/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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