Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32975df17acd2729b452eae377f78c54aaf962c9e8fdcb3eca6366110c5bb855' 
  AND token = '4sJp1zeC6Hlh4/NRJofQ3CPxh54qBJNyMLp94iC8aWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00081

JSON explain

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