SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd07c4d6ef7e9a3d9441f78469f03fc1550c761b9a65592ab7cc749f8e23f70' 
  AND token = '/zYQ6fWd52IQ/VjJy08HYAaZYMKCq86bg2zehcjLfNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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