Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a38e5b8b6f28f689ac40d5080beb20169e61d309757e75716f7f81c33c533db' 
  AND token = 'xAOYF4ukj5vZsCJ3Ozo3HkXymwsCCluym6i7PNwzS4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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