Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c91778d23c5cf4902c26e87cb8d0bf489ed3b9d9d8fe51cd951249ea611006f' 
  AND token = 'xbZt37m6YQN7CAvx2DKw5tWDKrWI3To4R2yPKg3U5DY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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