Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f20fdd36031c3b15f7c2b1a131b7473191cbc754dc0b21d5986fdaec6d3fe36' 
  AND token = 'wLowKYSoWDYvTt//5m8YdScFwi8fLP8cGAGPX/6vDL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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