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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b071b870e71d2e3f7ce9831bfea339a5bd732b61ab824e63aa3313b522ff56a' 
  AND token = '1FyMLt+WtZETSy+KnXcXPjTQyVRyzF97iJH95croOts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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