Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7956e185689660da26d95c2fae686772c6a8c0004e093612a35c1de0c466a149' 
  AND token = 'byWKIPaNZ/Nc6uVH1BQFLSblpdupo/4vAl0hvNKQ3sQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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