Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '416b7363de4840a8e2012284be75961c03b5509d1ea55267dac3ab1f1978e87d' 
  AND token = 'k4usPKsTLj4e5JocP0ncgaqNlIF6WmWIYPyE1xQsqXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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