SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4e29b991f8fdd3a097b560f782609c11b6d6c4b526d52f2e1319581adbead00' 
  AND token = 'XXwpE87LXZhhUu3kKz8pqGatlcKiKZpgzA18LBO134M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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