Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87d06f1100457e4d975e625bf2419465f94d2182b926bd2f6c0d7b8b3f63baba' 
  AND token = 'niCSZcRLZxGxYzSnieGrHKAALavtNxpBZWSLCmAe+90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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