Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2244b6ab8255da3392077cbd0a21f9893a35f82cca57c10f4c49e0b95137c3d8' 
  AND token = 'kvggPKT59bfucpQDvQANdmxnLDow65uXBiFV7TkxFA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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