Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e887311df2dc45a4dc23ecd53ef3fcaf97520cc7116d7e97247c3ca88a8f0af' 
  AND token = 'ywf2G0Z2R/WzztRWgLHJYtv87FqcAuzy5lSnbj07NnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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