Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4928203c8c9ac05243ee54893871500ea955942f622f87a54ce445164123ade6' 
  AND token = 'UnvHn3Sd1lwMGfuZzkUgzuhsNt7nt8XAgBI0+kU7Sbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}