Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c0ab13ae8864a347acac7ecf23589ba7150d31efc0218c84af3202ee5335c8' 
  AND token = 'tCittZs6e1Ai8E286ZIU7CWj0r5ZJYb7GUUIszNwut8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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