Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3258dec23720a802da4ae82ea1f632c7946500247f5d1620b5ec7e162add6df9' 
  AND token = '5ajJwbx1uWkxuuHqvFakJLTHUzyrV4NnFPJd8L4yYKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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