Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48a553cad43e0e606c93224f95f429297a2b63cd027051268ff3245e1f3a2477' 
  AND token = 'vrsjdW2mF+sBGKXjntb7w1IX5CjBQWrHqRxyuFI89j4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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