Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3b948802864446c6ae8a1fb19307797ce97b9e2f5b39e2b5b60b375d5c19e1f' 
  AND token = 'aM65lQPF3YoCR6lxIg2+paRK2qSimLHSqyceoMHIVhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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