Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '242456e12077e453e3bfd36c0facbe228481a5f95816cd622ce81a5b06e64315' 
  AND token = 'xoFvNDOyau/x9JTctrjO16MbgKVZkSgBQRyRgXtOtsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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