SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e8e726524dd77d8b96e33bee1ebcc964974bf207028aa6264cf0b1726048cb0' 
  AND token = 'R36ywYOoqFR7qgvJPaXWdCltP4Juqo+ROuYj1Nd/who=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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