Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49c99deaa2a37eaea345363fdcb3dccfffee2ef001af32cafa6505b283452ebc' 
  AND token = 'G5jiBLrNaL1ONtU+QJzgDcS8gd4CthldqGrnVuR/x1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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