Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e02119b1c14354234c6ecba264e90b97a5bb98a47b441ed69cf22fc6fca075c' 
  AND token = '0aFnB2jH1Y9cSfntb19PreSGOQDclSA3UUUCBr5i1mY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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