Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0abfd0b1d8fbe84688656fe869938eec51a3ea37f3eda007a2419c5f43586ef8' 
  AND token = '0NwaD40a6gmz4/DpQUi6gO6bU8MwSfdP8h62szLqubw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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