Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e2ad764e14fac9ffb697db4c50f624fb523a6665cbd14b98a4bd4e18f175099' 
  AND token = '6siY6PVMT7xsujAwnaDnuGz6V7GYk8SAQbjlIXErBg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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