Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8dec05b11653243b82942ee9ee85bf87cf540e6fdbcd3e5fb233bebdaf23e08' 
  AND token = 'iQf/6R3B/K/gNxDYwm4WJuVD/3cJHv28RlGqdnNJPKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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