Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ce1ff52fac89ab63fa4abc88f738d2eff34aefd71d66521d86ec22abd25c310' 
  AND token = 'GP9JuXwGajmrp50o3eGUHRRbbO55Wk7AF+7sH/98toc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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