Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15c67f17d9b539d687c0bc0dd98cab28aef41ef6ab975912950e1e03d73df9ed' 
  AND token = 'H8D5CYAmcc1rKgKZlddtK1sd6zzF4E7AcKPDTAInSB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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