Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f479cba33c7d5a45eb1deec43c0bcf5e0d8325556a29149349222f74e1213e7' 
  AND token = 'VeMmc4xR2y9+DNl1mxpV+VqAlvqRGlUCtWzDyTAjB7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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