Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96b46d0debbb68511f3ef12047152a3a963cffdea23e0304263eaf060751f841' 
  AND token = 'u1Yuc78k2Hhie4WxWkyY+bxadqBW8I6/lvTMEQUlYJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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