Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b73eda425a81799d53346660cfa54961d9d957ee92edcd18c47b6975eb2845' 
  AND token = 'uWJwvaKOPUrnwCreXF27klerl6khmml76ONPz18i7EI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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