Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb4d6721e205b272a09a7d0d9ee20f40bcd40013368dcf212c8d0ae9719e13ee' 
  AND token = 'dTiMB62cwaIh/S6kmaWsdTWP9XOZiLCb3ebXzwS5zAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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