Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81b1ff059dcf1c1d1dba160d8b68ea4fb3dbb230372ca2b3c679abf754864375' 
  AND token = 'aVMpB2SU41sd4q4na4omgeVSz0upKzhhTDCvOP5jyQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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