Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c117f544b898e2c943483c9bbfa22047bd95572400ec8fcb753a5d9a3a75ec4d' 
  AND token = '5sTiGVsK/wCLQeNBxXJs8NtuTQDVQKZqX4niR4Yw3yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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