Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8aa79aff1924eca76bb3af72697fc21de4c07b014f37c9245b968be186512c3' 
  AND token = 'PnxojFOM1hj/x8wGQAKR4QGcbGCVHh7hrcp2y3nQry8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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