Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c206390abfebfceaadb8a0d9b33ddc54c59c47fdcda00d8aef216740b8ab6cb' 
  AND token = 'GefhYIo/7X0+0UmeBb7BxgaXGnxlCDFSfpzrzHzorl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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