Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58b9a02be71717f7729c8b5535cce44971e5c6b388c2379c414db968cbf49d56' 
  AND token = 'U9hn9vGtr00Yu18abUCO4REmstnYcO/mFWS1ciLYPEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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