Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e46a8acc0e668c481438d4b865f217f0c8eb6a61109929734d18cd8ab7045658' 
  AND token = 'ssw/kO/oBAdQ0aODD6CUXZtUkNwXh7iDT4J2NZp0Ev0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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