Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885e0d60ff94f38658d36a01ed871ac9425857ed5cd42e3a5c407a98b9dfd544' 
  AND token = 'MyWGvTrKyMFNYkQVLPPyh2RG5WJk6Mw2aJA64rac174=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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