Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e4ef0ab06303ce06a403130aacf378bb795681164dd0212269f6bb7c9e585f' 
  AND token = 'EHRJv6uOJQN/+Fp88YWqTarci+XuJ1HblA3WfKQ5Huo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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