Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4895c998c350af5bb93955ea45fb8acac45c930a1e5c8c2e6fe2b9cc028ec0d5' 
  AND token = 'zoFVPI4VfhEomJ7PxDGkxkd2+olFrJ1lDy0dJgMyia0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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