SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e1abaaf09d17e436719f70e9c72f32172881287d92249d613b3ba2f5bac9630' 
  AND token = 'veuOj8KtnmXLMLgtiJYSIy0OaoIrhNG4jBzZj7v5T1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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