Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5319b6173c7ec4802d99536944b3e33aee43ffd515611fa89d03f5eb7bb89666' 
  AND token = '1uGYhqcPkisQDDK1YPItaHqcf52OWjT3HRYa5f+STwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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