Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebedd1beb9ce98d160d44ac3694d94a5cc307b32c8a4620be3acac795bf530a2' 
  AND token = 'cRunLNDXM5YApDO3giV4tIpKQDJqSn7UCBHgtl6Y1eE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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