Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a64c3f4afa9be515824128bb7e341fbef3a4318ce81fba522c9b7aa1cc8fe237' 
  AND token = 'Yh/tun9jfYDsaGo5LsBoRgRfsT25MZ8FIDZnuAk3a4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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