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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd02e8a2222f4b5c6466d183c068d652e993835715de022222bb4862a704f9560' 
  AND token = 'lkuv4X+UJeDlcBZU/o2e/ZWxZPSib+LGo+vnZWRXlhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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