SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f0af80d4233c28288f3f7fae8d9dab245fdd86f1a8c91722c6a92dd116c6805' 
  AND token = 'JAKgeGmnOH9slPvdKXMh0nZV50+/EaJJzQQ3+9Ug5n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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