Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a488b22cf54b4df244fbe673ae2443ac93d105ebde2cbb3f1f15b4af4cc79823' 
  AND token = 'Fpl4LKBDv4OuNxxdzM5JFeVpZJBge9IED7etSl5Ak78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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