Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d72601a41d44916c11ec0badac492f9d755db6471e10a4bedc4175f42946676' 
  AND token = 'ZJoKqDLnzd7FdwxXTpCS1aVyPqH6rdnKDh5nl+R2Su8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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