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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719b79444725ac2ecc4a2ce3ec5a07fef919cdc23e674892e14d9efa82e69f0a' 
  AND token = 'l5VIW/33KWVi/fHI93tNluGLKj6K7UAMoqP56cW8nP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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