Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '778c1fce2acf4bb6ac87fbb9c238cb64623c30b9505f5a59fbc5734b1dc7fcb1' 
  AND token = 's3yV7XrfqhSSJ9ST/s8aDngWt8dxivcnjo+7VxuOvo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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