Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f27dc8bf007dcdaca2a89d55152685f5e468ee2c6ebf2d26b805f73cdaacbd' 
  AND token = 'yH6h9OLQXYj6U0Svuyl4tBCPaU9MoQ/DDClD2UalOic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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