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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '955496528395781af29f7c2280744c6f803d17c016cca7d36457fa449e1c3529' 
  AND token = 'QyVmPevjqH8GsxHWAfr8okMhZcDkD9L2EJSCcft14nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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