Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a1447d36584e7cacac782783c35d4dc725151cb95d3dc9264819629229fff7d' 
  AND token = 'YxUqZEIjnT2f8LR7nbbmNUSazYb6pFrBm0OUrHSkVZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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