Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fa653ab61afab53878c74146a2b1da6b1b432143c1e87069fe051e5362b9e9d' 
  AND token = 'xkTlLwoRbqzBuEH3j/QoQsx1xjO2nvWB5Mx9ntw2PlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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