Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2ee6b47130831e9e8067ed29f31d765882c9e7be65e8f72770a1fbdba3dce87' 
  AND token = 'xSKtfuAwwZskeQvOwiEe3ZQC9F1FguPta1gP5R2Jyms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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