Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b44ae06a17dffbf33e1081c03b051dd9c2ef4266b841316e7c622ea184114b84' 
  AND token = 'FD4GzZbBYZ1SN3TJMB6himr0sJik5QTsoZ48x2CtBmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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