Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '38c4e176b2d645b2b273aad6b94b7872c16265babac491b9e65aae3e7552c536' 
  AND token = 'BYItt6PZL1JASZ5EfK2am6BGz4S684jxrc6eIVdhloM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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