Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f230c245c46f2c9c66049d47d25cadf3e6a4514695166880af117d3e5c30939c' 
  AND token = 'fBTwAq62xj9dH6glDD9tpritkXanWoPqkMox51hiyPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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