Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd18652a69512282352f20fa11c6d6ad3c243124caf8e832718ca95ed7729f5e8' 
  AND token = 'PRGCMW/eU7KSVZ0EooA1vBGt8IgZkbTXXtEA0A/szuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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