Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4d52359f4058604783468ba0744d999beef576cf2635cba997b5f02c4368637' 
  AND token = 'ed0RRhH7CF5idZqRg2Taioi9Wq9SgIfI461JjppwkTA=' 
  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"
    }
  }
}