Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '842a68cf0bf28aacb394d15d4374da3d8f2c700434a1a2afbfaea1995a425234' 
  AND token = 'SG04inAcrQE9RMb+xDkBCKnf6o7bnOYxUkpqyuS5pr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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