Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '312fd4c0b3bf9bdfaf1a211344cdc4e2deb770c506589fd9594e7c1208469888' 
  AND token = 'UqahCVU9yMas38YVS5Q5kAoZWhJYa9q32y0tD0YkGMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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