Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f81ccfcfbde34688617229b71c6c5a6caa786b21b3e07cbcfcdc6840955909f0' 
  AND token = '6iJr6gKWC2hUGqbTswF+PrK2PCgFA4Ut9yxAYJGsOqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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