Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cab0587270156b7064a3277b753aa00440004401bd688099320b913aa9445f8' 
  AND token = 'nwFh8gfgnTb/Uaex/yFUwfLxjftVDR61q1I7cSPpnyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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