Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28eceac4a3112cb44c73b934e8d4dafcaea9c000889cd76eac6c0b386ab910c1' 
  AND token = 'Fs9SWTE8upAie53Eeqjmo6VwRwjIvjLofzgEnTLd/H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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