Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b06fe400e1ad7c9bc74789fbfcc0ed9b76fcc33c84a8ec617d73a420e168cbe' 
  AND token = '9u0ORgS7XVMQ6vjM9vJRfXepgQv8NiPUj87MEy3nIrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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