Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f33da216e260c55a83c492151a8f94b51657059f9f3bdfe2787597c988d232' 
  AND token = 'ifmSruwanFV942Yn0VR6JN+ATx5xoicRmaPCyX53Icc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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