Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0fde5bde878cce7b8bb77d9e05d10aea88f634a1850a819a4504988462dc5981' 
  AND token = '+hkCEnqAlIjRhT4kOh2mmLC27xZEumt7biLRxTPt8lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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