Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0521644307122e15dbd284d0c582e92d05fae121eaf52b54cccec86ec05349d0' 
  AND token = 'VeKergiymXc64B8MHkhyODL3wPzP3TV6xG+KiTVFMzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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