Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3134c8b17c0bfc1b7bdc9e4ee65ce8613927c7eba54d148366d3aad8a25a8fd9' 
  AND token = 'bYp0PiF85N5Hzc33+5ap05dIAry/ikUWKdaIzmxrx1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}