Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e02d3a18c08d32beb2991ebb9171df81d8d298eef67ac03f2bff8be1e47d534' 
  AND token = 'dZrK4bA4STB62qRN3Nc/ax1ZmXTUaeSmrgVTgW1Lf6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}