Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2a51c474cf1bef8817a3171900decc53a4734fc99cf9bd8456c9a2f9952160' 
  AND token = 'sEwxG9ecRgH/AJeuKvVMfNjSOPIWgMT2eduLJNdN6tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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