Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4502a04301b5c0778c11e661d71c439b5c75e6a65ee18114a29c57a29232a668' 
  AND token = 'LE/joNNfmp7QYvkMdVvXSn/2c6KEgQNCxJsz+64zDNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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