Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61e3bc7c2ac111b95230dc44d2b13137a0be83f8b3c43ead60246c1da971fac3' 
  AND token = 'pm8aPBbUT+XmX80qdnPBxlTo5QgLGildy4Y3qxBVum4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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