Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0dc8d5ebcbc3c3862c10ed01f014e2a9d776d41f14b3fbe7294f0906b753b5fb' 
  AND token = 'TxBQJCYPJybZRCWRlnD8ItbOZecJW7tH+5r/b3RVZKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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