Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '736c5705aa73ef982df76a507db1d1a192b13e8ebd64c0bd6758537c62e8c31b' 
  AND token = 'tnY807sNR/mUhDmCkTLU09WLV1EP8aBnjKtrdcHTIC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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