Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd29849694fddf34942aca3f86840cbd3d88009adc87f14e4a1cccf735dc21a16' 
  AND token = 'P7N3cZx4TsdKE6Tkc3yDLj1JyW03E57khuE6zur59QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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