Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66af8e7a82415f395c2242f3ec3a62ad0f98bbec6a4b4015fe4411ed2cfb5f79' 
  AND token = 'HEw4yFOPJtL15O8MqRYpO2E8Oc52TsS8CbD4b7gDBM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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