Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eb33dcc7efa6ad263caaf50f43fe7841e1cd51d55f48b1eb5f40c3315245ae7' 
  AND token = 'HQbf/94vBWHWTbz4doWWK9mr7f/coUWKaFM8K3MOUGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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