Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1379642bbdbdce3a0c584ea685d4e1785b994af2a859b059d93fd1f33e932c14' 
  AND token = 'BeQep4dGgj3Iv/MAs5IYUhoioXcSRcRN+01UxGLby6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}