Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ecd9462965473c829dbe2e9c25fd1cdbac164b58e2a5137305af9dc3877489' 
  AND token = '+ruISPLYucIJcHdymx24zNFip/IEDMFiO980wbc9eAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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