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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9269aeac005ec5601730da5257c2561a8f90a07109b476569f7d601763026068' 
  AND token = '7k45iwDJDZoW+DBIpRx0NhhbO7fN5mW2Dr/Oi0o5tic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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