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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa207c1ff4f2e3241e66d250babe8e9d31afa4999313c94692dd89f1852887cd' 
  AND token = '40lbnRbWHpU9tSxjeKmktdr9xBFqM/HeDMBq9bk/TFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}