Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb26080d0f82b3322288dc02914577dbf544c0babb1fd75b0694ed4c95e446d1' 
  AND token = 'W+Er/Xto660/zYMDnxkiZVoUTUlH1kx6pyyWzwNRoZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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