SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fd6f9e4f3225a0a627f73fc1ae48bad6b6155f4e92b86ac10008175348511800' 
  AND token = 'woogEO3bCKDBosmcwHly83gbQnfHbpSKOqWdX8EJJWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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