Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac9cbaefb1a06c0e0a9f4f166fc8b61048a5d432215f4208d8d54183da8560d' 
  AND token = 'qfJzVdk3MVXg1UaDtnhIV/IX4QBRCA9PlPX//hVLDLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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