Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67d38591125f7dfe21f3cd542fe42b2f9b98ae5246aca17edfae8df5b0e59b80' 
  AND token = '9KX2O5tBaTHFxqIm9yXySnmuX7n/MyNdZFltkiqETzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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