Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '570e76a4516457a44cd3bd6264e906416bc0a970347607d88a8ca70a065c01ca' 
  AND token = 'plv6Vj0ojutwgDSQDwvGfDTwB/mV6JkCi0IQNZvMr7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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