Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd03abaa73232551877505fdebbff64ac90f131b70e4257a2506076620bdf3f6' 
  AND token = '4Oe/0MByWSThl75CXyP4LNg2LGV4XOwg/Fel2b0fYJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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