Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2cac68a8395b39aa910ec02949f6de4fa92cd7fa609f79c360d75652abb6cea' 
  AND token = '2aKCcqwAL/57vURXJokJuORI9hI4lUD9aUOe77ltHj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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