Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4127abbceb692eafe7b0dc9a06f71ad10651d5f36ea7e44e27ed8ab61134f0' 
  AND token = '5DBaK0A6BkwsmWQ1SunLA2zE1e/Y6XN027U8HFriqms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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