SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa45365b0d18c9bb16aec4956776005f11fb566045c3acacd2d34028c05ece6b' 
  AND token = '07qjVFAp9wgD76INkeA6D0Ox9gO3pdPHsibQotHcXJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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