Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1382b05871feb1b382dbdfef503b542abda0129e50292b7d2c04ad6adb9e2cd' 
  AND token = 'b8QmFQ8pq6HBYlcr9kipqUf5h9ikdBWYcwny6bVkJNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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