Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e9b4181c71458dab289294fe5a6af1cab1c87f2fb143d2ffcb6fddc78c716a2' 
  AND token = 'tgXBGayDT/ymDy7na2c3WEhvNMUG+66VkK+UHNDJP+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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