Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7293ae997d156afe5f01ed4bc8d299eaae818e051a2253a23b890f2a88f5de' 
  AND token = 'DovgE9AeYKw9ejm5GYnz3PnNUvixQKHswuutD01vDWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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