Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dac2f6f2d0e1635d5d999c93abd3f620100ca5a8da8e1b8ef5d05bf8ba36e779' 
  AND token = 'HxIcxcPbP66mTS8RcHjcFkoqg2T4I7X2ER/1C66m8qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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