SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1133c615a1767e938c77d88290a8e530d9895d95b09864aee34d25077fa016bf' 
  AND token = 'ZPFKpemBmlb41+4MT4nhA/5QazzQi0iXuxJ/VtgJtXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}