Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99b490a7ba27fc169109b8f805c9d7e78d0c79c331acfa2a5100b4883f2b54d7' 
  AND token = 'S0zMu9/LSIigWrAZ5RKcwbkgeJiNZDIoVmrEzMyyvMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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