Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '094beb69c3f9039e881101d893ce66b52cd14f6f9b76aaabe2389e014918ccb5' 
  AND token = 'jaq1lBpbgsrnJ5aKyky2V9XeVBqCE10nLDtnHjdrOgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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