Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c8887c9d2c1c1bef16be71f171d0273facf266de7355ca689e7145a6270c942' 
  AND token = 'YGOXwFIIG45hi5QpiwHq02gy8ArnE7NUZPnUYPQN360=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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