Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260a3319e3898d304bf73daa35da964b6ce84e53abf8d7e43d48257fea1f2bdd' 
  AND token = 'radu7c/rx95teG8muU2jPi3CEbkrK8GdoIdm4YRDjS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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