Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc5aea6674bc84e870e7b4705ec3201710ed113ece5409823a57faf1750bfda9' 
  AND token = 'lJ02AyIRGImNzH4s/O3bI6agu1F1GI41aowzU4hx56A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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