Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c113f8b990e760ad116c59ed1fc266b3c7a35cf786552855f99029ee2e0f06c' 
  AND token = 'SxBqDjmRWeqojOMOdGCUIQ58s/c92d0fwF47kSFR81M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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