SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7b7d0f6845d09b2900c0f75489b15cb974ae20f18fa2328613fdd1336f1c2165' 
  AND token = 'bw3BSOlKfV2XtbjO1esi01zHrLqrqI4VIgjvJp2q24E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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