Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa10e722ba98f86fda58681fd1068b844e8c0ba053125944b633c1b6b12f7b1a' 
  AND token = 'QdIusjvSx8G44rHUHILfo8NtwjPrESuwm48ys2+Fwc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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