SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbf40f95c968b5b210a5fedc1bc44a157b040079d853ef9634abb9153b96a3b6' 
  AND token = 'JPg+XJliHA2TlLIRyZ9OuH1BdZPGWSKQDepOPX+wEUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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