Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1c5c966d23004c610b71ed6269a0be8b916fc59ea8fa74f73bfac8f3f1e1e55' 
  AND token = 'yqvyKkPseXMymWxFEQDMZwx0Ex88azOY8GeFmMHdQQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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