Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ff5481351f10aceba7768c3d0c6bf26ec050c833464eff7c7d49ce40d594ab6' 
  AND token = 'waaSniMRM5GPsNRtlST4K/FwtoURitwCdFpCTvezFNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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