Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64fe8581d259dceea4f3f0f02d60f3c31a3b569b13589d2a047ef5b4a2433311' 
  AND token = 'UkIkvT26VRuWaMdk8eqLeziMcwzLdYewKC5xAOAltsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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