Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '196d825fa9b02b3abf770f762f7adfb67cc6266b51121145c65165a3087b287d' 
  AND token = 'jeEEOUD5aM+JyxVlonxd8jQC/rgB6Wsksea5xtpXXYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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