Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90dc1fd98f8f239175bdbecfa1e6970858a7cbc352fba16bb68d68ab9cec09eb' 
  AND token = 'EZ0iRvtgi2wE3j6NtBPjRn3I8jX2AYWLIWjnZSNmthA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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