SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eefd9d716b4759e89635136ed30074b6a9d76120a3ef4f0d42a0752e1709282' 
  AND token = 'gUYZx1dwIQwP8udhG+PoQgjuXUKsvu3KgJvrXFDP36w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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