Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b42a045233c2201fc413c6e66733f4c33d0a410698c6d7fdc161ae6edcd06cbd' 
  AND token = '4u2NqWizD4c7r+oWxDlRB8A4k9rFHEwEXOpCwz2At/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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