SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2240373f05b927b6aefa3f9dd914782060b30519ecf1db44383a4d43d7a4778' 
  AND token = 'MWBmOgysDZCiEBdiw+h/UFqagXzH4R0XkkxSPVT0lps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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