Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88607ab2ae703e23d79f9b182fabb59f4d1567436edcab2a221f0ddd33de52f0' 
  AND token = 'tLdpSe4eq6srz3YgdHsb0qlZvaFRaGHojNICLQIzIg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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