Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa6bb2cefc467a5b89c33354379ab8530b654ae1160456fcacc171fecd8c3e31' 
  AND token = 'xr3q8WU0IHlnaAgfjhgEK7X5ggcqvZ57sKcRtVvuFGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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