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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10bb1d34c0b67cc1f7d441bc228d0f9b426267044674231cf742d39adfd94d41' 
  AND token = 'd2h5nH2UxPDJAnOOucUmncSN01zD4yii3suuAUSfyrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00117

JSON explain

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