Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1912fe3a0a3b1d194e03dab6788d72e1c388db70b5246b607c0c0d2d86388649' 
  AND token = 'DXs4fj9mXvEXubzgeiRwpbbpOQNLLQ1W82zJvG1KXoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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