Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81af30883718b985e75c1ca03b42c2e39d2d15c92f7939d1190cad0c7951bf01' 
  AND token = 'xq9IV7egFOVUFaUF0NAnueivRuXORh3wLsWl2gdxoPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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