Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b91d117e0016748d83d6f2b297db3d4703e6527c06de5b5346e51c85e101a79c' 
  AND token = 'fGpAMEz5kPTNOXIKBok0Wpnkc2xwYsPpPiV7uvSJXnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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