Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bc1c28cad6b96cbd266b06d87f3999b07b8cc805f7d95ec8cbe8a228224118c' 
  AND token = 'rmlKjMrGpciWvGh5NLoKPiPGv/FsflaFmSavlHX2YHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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