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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '195563d33d423400f2ae8ab8302b5971b4213b33425bda15468a4a64cac51381' 
  AND token = 'OlmaiPMuXwZwl7SuXLzm7A6r5lhtFur9+sTFertETR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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