SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f95dec8ec0e83f06d979dbd32c3ae24b6d2af9465a5c6a55115b8f55511f6366' 
  AND token = 'RzlD4bsVHQL6EUNZhPQ/ZWr0qcFsbV7oUIYDeATBLjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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