Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d0222cb0efac866dca4e27daf916c4b1c0245f9065e5bc59d84ade84bb51b07' 
  AND token = 'pKneBWdqLUmo5LCxWSJhRKCjNdRiq/Gei1A1lS0Tu1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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