Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63e911798a062a0134bd3ad7825666030c5156527ba7d4d86cbee93757753fe8' 
  AND token = '+GQcDpW7yE8RWoNkntkQvRf/PV3UI2vBztkHxO8OA8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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