Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57c0fdf9ad6adc84d7e67eef0167a305729cf6c203b8347c02db3539d0c959ef' 
  AND token = '1T9Nn30SRiDXydg4rl+wIK3Pr9k6hvbQb1HayzJXP4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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