Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a642aa28cc84f98496689996577174ed4c512b6dc308dedbc5c319f659c597b0' 
  AND token = 'rhRh5LKUDAdo0HT4DZCG59wb4vRMJaMPE2zNWO1/Vo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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