Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '497957b5da6b44d00b5e6df5998eca5d14c74bd0cad084476ef5d25d89b5a8fb' 
  AND token = 'xFMbxdJYi0lg9ZzjtdU+CHf7nebqUydWg9yDLBcxbl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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