Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179d0fb306596956e6f54d2712220c5f98d39fcea13eaf366e1dc756dbae7261' 
  AND token = 'R/nQ8jcp5A6FXpuZ6Dx0AxuLmUekNDjNFEcGoo2OLxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}