Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b7c098c022bf3c356077bd9ba9cef0e6b7fc170a6829148f6b1c086dbb0ea81' 
  AND token = 'XPaVjL7HtUATZZQqSQDmSzk1IzVQqGthV6yPTerZaAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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