Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc121373f346ff48f1a11c6559f7db9b528fa7f746146ca648b9ef6df8129096' 
  AND token = 'OFHVk3lPOWv5jrmcL98P4qbZESYUEEVORsoB4wjom94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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