Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c97a7ff97220c413310b8a00ad13eced6efb8af9ee97fd985a8d500dedd41bc' 
  AND token = 'MvpqgauGlx+5+3xRYiQ1eINJ2ES8zOJySjIj6KLT7UY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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