Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2f005b8c133550593d1536cb72be3eb57c02fbf3703377ca31ab407d0af08e5' 
  AND token = 'n4f7nFQZ+32t8N5RgH+vo1W194dzu5mMw3NEHB7rvBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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