Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7635c377970641e66d6f23cd044cd209eef04bac502745b5abea47cef302677c' 
  AND token = 'IN2ma+PLY+shnq2oJ5Mi6kSLunxQPpja7X/9TMiu4H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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