Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '904c480c617d5619f6a37b3f88896f3021fabb1e03c793eb6ae59bb19cf19ca8' 
  AND token = 'LkGNV1yzasvROFUeaTkpCiuE68igp/ZG+roxjJKj0/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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