Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fb0da6af21800e34c637c00575d9a85f8812a0bb57f54fb27935ea1923fb3ffa' 
  AND token = 'y/2Z1oTOqvnsnso15sywEEMPT18F3tu9zZ04/V2j4fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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