Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985a738b113dec50ee32c84ed5a179ea3215059cc3c154fca07fa1105ff1e6fb' 
  AND token = '0WNg7wKhP5fH+x9R22FcVqTeOVo1eaiSTGYngxDCF8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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