Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac6a7189c0d253097a58d6651a9a69f6765ac2ca216b6575cac34cea4f14bec' 
  AND token = 'upw6xVwU6/ss9FzxDiwQcKIAhhGF86lDgxLAoFZ0K3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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