Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69835478aae47ad57eb0a47596c6e46320557bde5923a5fc158f1654e4f90003' 
  AND token = 'nc76IclU+ZynmA4iyDkNrwE90iBz74PzO5HiW42qjOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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