Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9951088f20dbae8e4d597e8fca8c6554e9f6d84d7562338aaeb3618879f0ed9' 
  AND token = 'LTiWI8ST1V/Hz+g72OpNCSxUhIDicNf0XWQ6BvbVLBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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