Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be5800fb0ad03247b4906ca09c165f6cce80076b404e406f14ad382c32171445' 
  AND token = 'nFsMqjjiedBVr+VF2e3AulRNvCHXpOfaViGNPT1bg90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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