Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9d077d659baba873f5083a13ca74192512433e0646d9c43e6367ed8fdfcc480e' 
  AND token = '9ihU6AMJTFAT9BdeqX0NHNQMalxXXT7zS6mUgqWyRWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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