Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b70257c3474da2abfc386945a4545512011184cadf5b1413c7699861d86aa949' 
  AND token = 'xF85El2S6hFoASIcGmJUnzGPRI+Q4nEWj7d1tu+AhmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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