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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '17dacf98faa2ac9bf8285a267ec15702a663e59009aee0587e7115a94abdd8ea' 
  AND token = 'Vxm4yxzbPCnNRCJ6tPaoyxsiIjqpoAPGGVYwweLnST0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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