Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd81e49a9bea3d179603b593fe7531fcdb250bca13369f48afc5a16e9b1bf8f33' 
  AND token = 'r9PQuCtt8x/FXrq9swuGOs2KGlV/rBw4jOyq4eWEEtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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