Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '50b14929d396045ecccffd5cc80b917b4f49f40758e049f1f44d815b10f2fb7c' 
  AND token = 'wFSgPN657p0PkMYpgyiEOr9/23Ihrw8Oc+dOhwtbcJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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