Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee4407ba6acea64a738f5f3086b1c29d51c54b87aec2facf05a335109672068f' 
  AND token = '3387kbDRQe0UI86UQMZV6HHPtzL9PT/U3g81C9VLl+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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