Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db82e6eb8e353d616058a63b83edcb9b192b143b86600640b4607dbea867291f' 
  AND token = 'JnAFFs0k0ZbUlFmmeibYbDHwFROPu3NBAn17e4Y80X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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