Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '417143c2b2a0ddf0eac52d0e8389c64485936952ce35636f423ca9fde823b1ce' 
  AND token = 'QlietWIouaIyqvJDbIjppfoXGMkvvx/cb+vmzgROJLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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