Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95fe0f1ad193f030dca5fe64eb5952fe9abd1735683a07313d263ee08dc5eb1' 
  AND token = '8z1X5ffbo2FbPWybvg5ujpQNjMKFB04WOL6yugy9RJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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