Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96160fc0917fed4cbfba7bd26eecbc862cc178afb976bf503b12551e0520bf1d' 
  AND token = 'qC1qE9b55kp69fkhFNK5j4qMpNuXyzNSLBZInnt4YMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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