SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28327bfe9b5b611646ab5d16f9f2ea6fcbd1d4ef1094d6e5172a1dd45b023ec6' 
  AND token = 'kBOBN7/o78KuQOFAjm7WJ70czHvGoP9CHD1EhAdVqxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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