Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f8e8b006639b4454d648c4b4a25ffa40ef8cf5392be84fce7602e75fadf8876b' 
  AND token = 'GfrX0YWN58bmZmEhZXAIznFQc8cXS37rkV4iv0ivRNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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