Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de7bf776b5c7d95bdb490c655c5d098e3914ae2af23f07b9fd4a1041e309274e' 
  AND token = 'm48HDuMIKhY7ep0khZHHHONrpy/9LG8kW7KEAAVpwQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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